Vetster has different cancellation policy scenarios based on the time since the booking was made and the amount of time to the appointment.
"Instant Booking" - if the booking is made within an hour to the appointment and is cancelled, the appointment fee will still be charged.
"Same Day Booking" - if the booking is made within 24 hours of the appointment and is cancelled within an hour (grace-period) you will be fully refunded. If the booking is cancelled outside of the grace-period you will be charged the appointment fee.
"Future Booking" - if the booking is cancelled more than 24 hours before the appointment you will not be penalized.